Reproductive Ability of Hybrids of Striga aspera and Striga hermonthica.

abstract：:Success in biological control of plant diseases remains inconsistent in the field. A collection of well-characterized Streptomyces antagonists (n = 19 isolates) was tested for their capacities to inhibit pathogenic Streptomyces scabies (n = 15 isolates). There was significant variation among antagonists in ability to ...

journal_title：Phytopathology

authors： Otto-Hanson LK,Grabau Z,Rosen C,Salomon CE,Kinkel LL

更新日期：2013-01-01 00:00:00

abstract：:ABSTRACT The infection of Arabidopsis thaliana roots with the obligate parasite Orobanche ramosa represents a useful model for a study of the molecular events involved in the host plant response to a parasitic plant attack. To avoid analysis problems due to the subterranean development of O. ramosa, we developed two i...

journal_title：Phytopathology

authors： Dos Santos CV,Letousey P,Delavault P,Thalouarn P

更新日期：2003-04-01 00:00:00

abstract：:Indicator species analysis (ISA) uses indices of an organism's relative abundance and occurrence to estimate the strength of its associations with a priori groups of interest and a simple randomization test to evaluate the probability of association. Because ISA values tend to be greatest when a species is both relati...

journal_title：Phytopathology

authors： Severns PM,Sykes EM

更新日期：2020-12-01 00:00:00

abstract：:ABSTRACT A previously undescribed leaf spot disease of banana has been discovered in southern and Southeast Asia. The fungus identified as the causal agent of this leaf spot has a Mycosphaerella teleomorph stage and a Septoria anamorph stage. Isolation and reinoculation of the fungus to banana reproduced symptoms and ...

journal_title：Phytopathology

authors： Carlier J,Zapater MF,Lapeyre F,Jones DR,Mourichon X

更新日期：2000-08-01 00:00:00

abstract：:Growth chamber and field studies were conducted with organic amendment mixtures of carbon (C) and nitrogen (N) at C:N ratios 10:1, 20:1, 30:1, and 40:1 and amendment rates of C at 2, 4, 6, and 8 mg/g of soil (C:N ratio 30:1) to evaluate anaerobic soil disinfestation (ASD) effects on germination and colonization of Scl...

journal_title：Phytopathology

authors： Shrestha U,Dee ME,Ownley BH,Butler DM

更新日期：2018-03-01 00:00:00

abstract：:We report the detection of the huanglongbing (HLB)-associated bacterium 'Candidatus Liberibacter asiaticus' from both plants and insects in Pakistan and the seasonal variability in the numbers of 'Ca. L. asiaticus'-positive psyllid vector, Diaphorina citri. Our studies showed that 'Ca. L. asiaticus' was detectable fro...

journal_title：Phytopathology

authors： Razi MF,Keremane ML,Ramadugu C,Roose M,Khan IA,Lee RF

更新日期：2014-03-01 00:00:00

abstract：:ABSTRACT Pear blossoms were sampled during various stages of bloom in 1991 and 1992 from orchards at Cashmere, WA, and Corvallis and Medford, OR, for epiphytic populations of culturable bacteria. On stigmatic surfaces, bacteria were isolated from 2 to 32% of blossoms prior to petal expansion and from 47 to 94% of blos...

journal_title：Phytopathology

authors： Stockwell VO,McLaughlin RJ,Henkels MD,Loper JE,Sugar D,Roberts RG

更新日期：1999-12-01 00:00:00

abstract：:ABSTRACT The contribution of gluconic acid secretion to the colonization of apple tissue by Penicillium expansum was analyzed by modulation (increase or decrease) of gluconic acid accumulation at the infection court. P. expansum isolates that express the most gox2 transcripts and concomitant glucose oxidase (GOX) acti...

journal_title：Phytopathology

authors： Hadas Y,Goldberg I,Pines O,Prusky D

更新日期：2007-03-01 00:00:00

abstract：:Deoxynivalenol (DON) concentrations in mature wheat grain are usually correlated with symptoms produced by Gibberella zeae infection. However, there have been numerous observations of unacceptably high DON in asymptomatic crops, which can lead to lower-than-expected milling reductions in DON. We conducted a field expe...

journal_title：Phytopathology

authors： Cowger C,Arrellano C

更新日期：2010-07-01 00:00:00

abstract：:ABSTRACT Effective biocontrol strains of Trichoderma virens can induce the production of defense-related compounds in the roots of cotton. Ineffective strains do not induce these compounds to significant levels. This elicittation was found to be heat stable, insoluble in chloroform, passed through a 5K molecular weigh...

journal_title：Phytopathology

authors： Hanson LE,Howell CR

更新日期：2004-02-01 00:00:00

abstract：:We studied spore dispersal by Dothistroma septosporum, causal agent of a serious outbreak of red band needle blight in lodgepole pine plantations in northwest British Columbia. Spore abundance was assessed at different distances and heights from inoculum sources and microclimatic factors were recorded during two conse...

journal_title：Phytopathology

authors： Boateng K,Lewis KJ

更新日期：2015-01-01 00:00:00

abstract：:Fusarium wilt incited by Fusarium oxysporum f. sp. niveum is a seed-transmitted disease that causes significant yield loss in watermelon production. The pathogen may infect watermelon seeds latently, which can be an important inoculum source and contribute to severe disease outbreak. However, information regarding inf...

journal_title：Phytopathology

authors： Petkar A,Ji P

更新日期：2017-07-01 00:00:00

abstract：:ABSTRACT One hundred monoascosporic isolates of Mycosphaerella fijiensis were collected in February and November 1994 from each of two banana (Musa spp.) plantations in Costa Rica. Locations at San Pablo and Coopecariari had been sprayed with propiconazole for the past 7 years to control black Sigatoka. One hundred mo...

journal_title：Phytopathology

authors： Romero RA,Sutton TB

更新日期：1997-01-01 00:00:00

abstract：:ABSTRACT We determined that multiple and independent introductions of copper resistance genes have taken place for strains of Xanthomonas citri subsp. citri from Argentina and strains of X. alfalfae subsp. citrumelonis from Florida. This study compared the partial nucleotide sequences of principal copper resistance ge...

journal_title：Phytopathology

authors： Behlau F,Hong JC,Jones JB,Graham JH

更新日期：2013-05-01 00:00:00

abstract：:ABSTRACT The spread of Fusarium head blight of wheat from a small area inoculum source was examined in wheat plots (100, 625, or 2,500 m(2)) inoculated in the center with Gibberella zeae-colonized corn kernels or macro-conidia sprayed on heads at anthesis. With the first inoculation method, disease foci were produced ...

journal_title：Phytopathology

authors： Fernando WG,Paulitz TC,Seaman WL,Dutilleul P,Miller JD

更新日期：1997-04-01 00:00:00

abstract：:ABSTRACT Multivariate random-effects meta-analyses were conducted on 12 years of data from 14 U.S. states to determine the mean yield and test-weight responses of wheat to treatment with propiconazole, prothioconazole, tebuconazole, metconazole, and prothioconazole+tebuconazole. All fungicides led to a significant inc...

journal_title：Phytopathology

authors： Paul PA,McMullen MP,Hershman DE,Madden LV

更新日期：2010-02-01 00:00:00

abstract：:ABSTRACT The possibility that the Ht1 gene or genes tightly linked to Ht1 convey general resistance to races of Exserohilum turcicum that are virulent against Ht1 (i.e., residual resistance) could be useful in sweet corn where the Ht1 gene is present in many commercial hybrids and breeding populations. The objective o...

journal_title：Phytopathology

authors： Campaña A,Pataky JK

更新日期：2005-01-01 00:00:00

abstract：:ABSTRACT An experiment was designed to compare cycles of selection of four maize genotypes for ear- and grain-quality characteristics, interactions with Aspergillus flavus and Fusarium verticillioides infection, and insect ear infestation in two seasons. Mean infection levels by A. flavus and F. verticillioides were s...

journal_title：Phytopathology

authors： Cardwell KF,Kling JG,Maziya-Dixon B,Bosque-Pérez NA

更新日期：2000-03-01 00:00:00

abstract：:ABSTRACT Over 4 years, the environmental conditions and the causal agents of Fusarium head blight (FHB) disease of wheat were determined in field sites in four European countries: Hungary, Ireland, Italy, and the United Kingdom. Polymerase chain reaction-based methods were used to detect each species causing FHB and q...

journal_title：Phytopathology

authors： Xu XM,Nicholson P,Thomsett MA,Simpson D,Cooke BM,Doohan FM,Brennan J,Monaghan S,Moretti A,Mule G,Hornok L,Beki E,Tatnell J,Ritieni A,Edwards SG

更新日期：2008-01-01 00:00:00

abstract：:The fungus Rhizoctonia oryzae-sativae is an important pathogen that causes the aggregated sheath spot disease on rice. In this study, we investigated the genetic structure of rice-adapted populations of R. oryzae-sativae sampled from traditional rice-cropping areas from the Paraíba Valley, São Paulo, Brazil, and from ...

journal_title：Phytopathology

authors： Pereira DA,Ceresini PC,Castroagudín VL,Ramos-Molina LM,Chavarro-Mesa E,Negrisoli MM,Campos SN,Pegolo ME,Takada HM

更新日期：2017-01-01 00:00:00

abstract：:Race Ug99 (TTKSK) of Puccinia graminis f. sp. tritici, detected in Uganda in 1998, has been recognized as a serious threat to food security because it possesses combined virulence to a large number of resistance genes found in current widely grown wheat (Triticum aestivum) varieties and germplasm, leading to its poten...

journal_title：Phytopathology

authors： Singh RP,Hodson DP,Jin Y,Lagudah ES,Ayliffe MA,Bhavani S,Rouse MN,Pretorius ZA,Szabo LJ,Huerta-Espino J,Basnet BR,Lan C,Hovmøller MS

更新日期：2015-07-01 00:00:00

abstract：:Resin obtained from Pinus radiata and five monoterpene components of resin (limonene, α-pinene, β-pinene, camphene, and myrcene) were tested to determine their effects on mycelial growth and germination and survival of spores of Fusarium circinatum, the cause of pitch canker in pine, and F. temperatum, which is interf...

journal_title：Phytopathology

authors： Slinski SL,Zakharov F,Gordon TR

更新日期：2015-01-01 00:00:00

abstract：:Hemileia vastatrix caused a severe epidemic in Central America in 2012-13. The gradual development of that epidemic on nearly a continental scale suggests that dispersal at different scales played a significant role. Shade has been proposed as a way of reducing uredospore dispersal. The effect of shade (two strata: Er...

journal_title：Phytopathology

authors： Boudrot A,Pico J,Merle I,Granados E,Vílchez S,Tixier P,Filho Ede M,Casanoves F,Tapia A,Allinne C,Rice RA,Avelino J

更新日期：2016-06-01 00:00:00

abstract：:The vacuolar H+-ATPases (V-ATPases) are conserved ATP-dependent proton pumps that acidify intracellular compartments in eukaryotic cells. The role of Cpvma1, a V-ATPase catalytic subunit A of Cryphonectria parasitica, was investigated by generating cpvma1-overexpressing and cpvma1-silenced strains. The mutant strains ...

journal_title：Phytopathology

authors： Li R,Bai S,He Y,Chen Q,Yao Y,Wang J,Chen B

更新日期：2019-08-01 00:00:00

abstract：:Citrus is an economically important fruit crop that is severely afflicted by Asiatic citrus bacterial canker (CBC), a disease caused by the phytopathogen Xanthomonas citri subsp. citri (X. citri). To gain insight into the molecular epidemiology of CBC, 42 Xanthomonas isolates were collected from a range of Citrus spp....

journal_title：Phytopathology

authors： Chiesa MA,Siciliano MF,Ornella L,Roeschlin RA,Favaro MA,Delgado NP,Sendín LN,Orce IG,Ploper LD,Vojnov AA,Vacas JG,Filippone MP,Castagnaro AP,Marano MR

更新日期：2013-06-01 00:00:00

abstract：:Key weather factors determining the occurrence and severity of powdery mildew and yellow rust epidemics on winter wheat were identified. Empirical models were formulated to qualitatively predict a damaging epidemic (>5% severity) and quantitatively predict the disease severity given a damaging epidemic occurred. The d...

journal_title：Phytopathology

authors： Te Beest DE,Paveley ND,Shaw MW,van den Bosch F

更新日期：2008-05-01 00:00:00

abstract：:ABSTRACT The ability of Dactylella oviparasitica and Fusarium oxysporum to suppress Heterodera schachtii numbers was examined in field microplots. Fungi were individually added to fumigated field soil that was seeded with sugar beet. Four weeks later, soils were infested with H. schachtii second-stage juveniles (J2). ...

journal_title：Phytopathology

authors： Olatinwo R,Borneman J,Becker JO

更新日期：2006-08-01 00:00:00

abstract：:ABSTRACT Sphaeropsis sapinea is the causal agent of Sphaeropsis tip blight disease of pines. Past surveys of diseased and symptomless Austrian and Scots pines revealed that latent infections of symptomless shoots by S. sapinea are common. The role of these latent infections in the tip blight disease is unknown. A samp...

journal_title：Phytopathology

authors： Flowers J,Hartman J,Vaillancourt L

更新日期：2003-12-01 00:00:00

abstract：:ABSTRACT One drawback of traditional methods for fungal biomass measurement is the inability to distinguish biomass of an introduced fungus from that of the indigenous microbial community in nonsterile soil. We quantified biomass of a specific fungal biological control agent in nonsterile soil using epifluorescence mi...

journal_title：Phytopathology

authors： Orr KA,Knudsen GR

更新日期：2004-12-01 00:00:00

abstract：:Stalk rot is one of the most serious and widespread diseases in maize, and effective control measures are currently lacking. Therefore, this study aimed to develop a new biological agent to manage this disease. An antagonistic bacterial strain, TA-1, was isolated from rhizosphere soil and identified as Bacillus methyl...

journal_title：Phytopathology

authors： Cheng X,Ji X,Ge Y,Li J,Qi W,Qiao K

更新日期：2019-04-01 00:00:00